source/libsmb/cliconnect.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    client connect/disconnect routines
   4    Copyright (C) Andrew Tridgell 1994-1998
   5    Copyright (C) Andrew Bartlett 2001-2003
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22
  23 extern pstring user_socket_options;
  24
  25 static const struct {
  26         int prot;
  27         const char *name;
  28 } prots[] = {
  29         {PROTOCOL_CORE,"PC NETWORK PROGRAM 1.0"},
  30         {PROTOCOL_COREPLUS,"MICROSOFT NETWORKS 1.03"},
  31         {PROTOCOL_LANMAN1,"MICROSOFT NETWORKS 3.0"},
  32         {PROTOCOL_LANMAN1,"LANMAN1.0"},
  33         {PROTOCOL_LANMAN2,"LM1.2X002"},
  34         {PROTOCOL_LANMAN2,"DOS LANMAN2.1"},
  35         {PROTOCOL_LANMAN2,"LANMAN2.1"},
  36         {PROTOCOL_LANMAN2,"Samba"},
  37         {PROTOCOL_NT1,"NT LANMAN 1.0"},
  38         {PROTOCOL_NT1,"NT LM 0.12"},
  39         {-1,NULL}
  40 };
  41
  42 /**
  43  * Set the user session key for a connection
  44  * @param cli The cli structure to add it too
  45  * @param session_key The session key used.  (A copy of this is taken for the cli struct)
  46  *
  47  */
  48
  49 static void cli_set_session_key (struct cli_state *cli, const DATA_BLOB session_key)
  50 {
  51         cli->user_session_key = data_blob(session_key.data, session_key.length);
  52 }
  53
  54 /****************************************************************************
  55  Do an old lanman2 style session setup.
  56 ****************************************************************************/
  57
  58 static NTSTATUS cli_session_setup_lanman2(struct cli_state *cli,
  59                                           const char *user,
  60                                           const char *pass, size_t passlen,
  61                                           const char *workgroup)
  62 {
  63         DATA_BLOB session_key = data_blob_null;
  64         DATA_BLOB lm_response = data_blob_null;
  65         fstring pword;
  66         char *p;
  67
  68         if (passlen > sizeof(pword)-1) {
  69                 return NT_STATUS_INVALID_PARAMETER;
  70         }
  71
  72         /* LANMAN servers predate NT status codes and Unicode and ignore those
  73            smb flags so we must disable the corresponding default capabilities
  74            that would otherwise cause the Unicode and NT Status flags to be
  75            set (and even returned by the server) */
  76
  77         cli->capabilities &= ~(CAP_UNICODE | CAP_STATUS32);
  78
  79         /* if in share level security then don't send a password now */
  80         if (!(cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL))
  81                 passlen = 0;
  82
  83         if (passlen > 0 && (cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) && passlen != 24) {
  84                 /* Encrypted mode needed, and non encrypted password supplied. */
  85                 lm_response = data_blob(NULL, 24);
  86                 if (!SMBencrypt(pass, cli->secblob.data,(uchar *)lm_response.data)) {
  87                         DEBUG(1, ("Password is > 14 chars in length, and is therefore incompatible with Lanman authentication\n"));
  88                         return NT_STATUS_ACCESS_DENIED;
  89                 }
  90         } else if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) && passlen == 24) {
  91                 /* Encrypted mode needed, and encrypted password supplied. */
  92                 lm_response = data_blob(pass, passlen);
  93         } else if (passlen > 0) {
  94                 /* Plaintext mode needed, assume plaintext supplied. */
  95                 passlen = clistr_push(cli, pword, pass, sizeof(pword), STR_TERMINATE);
  96                 lm_response = data_blob(pass, passlen);
  97         }
  98
  99         /* send a session setup command */
 100         memset(cli->outbuf,'\0',smb_size);
 101         set_message(NULL,cli->outbuf,10, 0, True);
 102         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 103         cli_setup_packet(cli);
 104
 105         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 106         SSVAL(cli->outbuf,smb_vwv2,cli->max_xmit);
 107         SSVAL(cli->outbuf,smb_vwv3,2);
 108         SSVAL(cli->outbuf,smb_vwv4,1);
 109         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 110         SSVAL(cli->outbuf,smb_vwv7,lm_response.length);
 111
 112         p = smb_buf(cli->outbuf);
 113         memcpy(p,lm_response.data,lm_response.length);
 114         p += lm_response.length;
 115         p += clistr_push(cli, p, user, -1, STR_TERMINATE|STR_UPPER);
 116         p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE|STR_UPPER);
 117         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 118         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 119         cli_setup_bcc(cli, p);
 120
 121         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 122                 return cli_nt_error(cli);
 123         }
 124
 125         show_msg(cli->inbuf);
 126
 127         if (cli_is_error(cli)) {
 128                 return cli_nt_error(cli);
 129         }
 130
 131         /* use the returned vuid from now on */
 132         cli->vuid = SVAL(cli->inbuf,smb_uid);
 133         fstrcpy(cli->user_name, user);
 134
 135         if (session_key.data) {
 136                 /* Have plaintext orginal */
 137                 cli_set_session_key(cli, session_key);
 138         }
 139
 140         return NT_STATUS_OK;
 141 }
 142
 143 /****************************************************************************
 144  Work out suitable capabilities to offer the server.
 145 ****************************************************************************/
 146
 147 static uint32 cli_session_setup_capabilities(struct cli_state *cli)
 148 {
 149         uint32 capabilities = CAP_NT_SMBS;
 150
 151         if (!cli->force_dos_errors)
 152                 capabilities |= CAP_STATUS32;
 153
 154         if (cli->use_level_II_oplocks)
 155                 capabilities |= CAP_LEVEL_II_OPLOCKS;
 156
 157         capabilities |= (cli->capabilities & (CAP_UNICODE|CAP_LARGE_FILES|CAP_LARGE_READX|CAP_LARGE_WRITEX|CAP_DFS));
 158         return capabilities;
 159 }
 160
 161 /****************************************************************************
 162  Do a NT1 guest session setup.
 163 ****************************************************************************/
 164
 165 static NTSTATUS cli_session_setup_guest(struct cli_state *cli)
 166 {
 167         char *p;
 168         uint32 capabilities = cli_session_setup_capabilities(cli);
 169
 170         memset(cli->outbuf, '\0', smb_size);
 171         set_message(NULL,cli->outbuf,13,0,True);
 172         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 173         cli_setup_packet(cli);
 174
 175         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 176         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 177         SSVAL(cli->outbuf,smb_vwv3,2);
 178         SSVAL(cli->outbuf,smb_vwv4,cli->pid);
 179         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 180         SSVAL(cli->outbuf,smb_vwv7,0);
 181         SSVAL(cli->outbuf,smb_vwv8,0);
 182         SIVAL(cli->outbuf,smb_vwv11,capabilities);
 183         p = smb_buf(cli->outbuf);
 184         p += clistr_push(cli, p, "", -1, STR_TERMINATE); /* username */
 185         p += clistr_push(cli, p, "", -1, STR_TERMINATE); /* workgroup */
 186         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 187         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 188         cli_setup_bcc(cli, p);
 189
 190         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 191                 return cli_nt_error(cli);
 192         }
 193
 194         show_msg(cli->inbuf);
 195
 196         if (cli_is_error(cli)) {
 197                 return cli_nt_error(cli);
 198         }
 199
 200         cli->vuid = SVAL(cli->inbuf,smb_uid);
 201
 202         p = smb_buf(cli->inbuf);
 203         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 204         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
 205         p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
 206
 207         if (strstr(cli->server_type, "Samba")) {
 208                 cli->is_samba = True;
 209         }
 210
 211         fstrcpy(cli->user_name, "");
 212
 213         return NT_STATUS_OK;
 214 }
 215
 216 /****************************************************************************
 217  Do a NT1 plaintext session setup.
 218 ****************************************************************************/
 219
 220 static NTSTATUS cli_session_setup_plaintext(struct cli_state *cli,
 221                                             const char *user, const char *pass,
 222                                             const char *workgroup)
 223 {
 224         uint32 capabilities = cli_session_setup_capabilities(cli);
 225         char *p;
 226         fstring lanman;
 227
 228         fstr_sprintf( lanman, "Samba %s", SAMBA_VERSION_STRING);
 229
 230         memset(cli->outbuf, '\0', smb_size);
 231         set_message(NULL,cli->outbuf,13,0,True);
 232         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 233         cli_setup_packet(cli);
 234
 235         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 236         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 237         SSVAL(cli->outbuf,smb_vwv3,2);
 238         SSVAL(cli->outbuf,smb_vwv4,cli->pid);
 239         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 240         SSVAL(cli->outbuf,smb_vwv8,0);
 241         SIVAL(cli->outbuf,smb_vwv11,capabilities);
 242         p = smb_buf(cli->outbuf);
 243
 244         /* check wether to send the ASCII or UNICODE version of the password */
 245
 246         if ( (capabilities & CAP_UNICODE) == 0 ) {
 247                 p += clistr_push(cli, p, pass, -1, STR_TERMINATE); /* password */
 248                 SSVAL(cli->outbuf,smb_vwv7,PTR_DIFF(p, smb_buf(cli->outbuf)));
 249         }
 250         else {
 251                 p += clistr_push(cli, p, pass, -1, STR_UNICODE|STR_TERMINATE); /* unicode password */
 252                 SSVAL(cli->outbuf,smb_vwv8,PTR_DIFF(p, smb_buf(cli->outbuf)));
 253         }
 254
 255         p += clistr_push(cli, p, user, -1, STR_TERMINATE); /* username */
 256         p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE); /* workgroup */
 257         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 258         p += clistr_push(cli, p, lanman, -1, STR_TERMINATE);
 259         cli_setup_bcc(cli, p);
 260
 261         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 262                 return cli_nt_error(cli);
 263         }
 264
 265         show_msg(cli->inbuf);
 266
 267         if (cli_is_error(cli)) {
 268                 return cli_nt_error(cli);
 269         }
 270
 271         cli->vuid = SVAL(cli->inbuf,smb_uid);
 272         p = smb_buf(cli->inbuf);
 273         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 274         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
 275         p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
 276         fstrcpy(cli->user_name, user);
 277
 278         if (strstr(cli->server_type, "Samba")) {
 279                 cli->is_samba = True;
 280         }
 281
 282         return NT_STATUS_OK;
 283 }
 284
 285 /****************************************************************************
 286    do a NT1 NTLM/LM encrypted session setup - for when extended security
 287    is not negotiated.
 288    @param cli client state to create do session setup on
 289    @param user username
 290    @param pass *either* cleartext password (passlen !=24) or LM response.
 291    @param ntpass NT response, implies ntpasslen >=24, implies pass is not clear
 292    @param workgroup The user's domain.
 293 ****************************************************************************/
 294
 295 static NTSTATUS cli_session_setup_nt1(struct cli_state *cli, const char *user,
 296                                       const char *pass, size_t passlen,
 297                                       const char *ntpass, size_t ntpasslen,
 298                                       const char *workgroup)
 299 {
 300         uint32 capabilities = cli_session_setup_capabilities(cli);
 301         DATA_BLOB lm_response = data_blob_null;
 302         DATA_BLOB nt_response = data_blob_null;
 303         DATA_BLOB session_key = data_blob_null;
 304         NTSTATUS result;
 305         char *p;
 306
 307         if (passlen == 0) {
 308                 /* do nothing - guest login */
 309         } else if (passlen != 24) {
 310                 if (lp_client_ntlmv2_auth()) {
 311                         DATA_BLOB server_chal;
 312                         DATA_BLOB names_blob;
 313                         server_chal = data_blob(cli->secblob.data, MIN(cli->secblob.length, 8));
 314
 315                         /* note that the 'workgroup' here is a best guess - we don't know
 316                            the server's domain at this point.  The 'server name' is also
 317                            dodgy...
 318                         */
 319                         names_blob = NTLMv2_generate_names_blob(cli->called.name, workgroup);
 320
 321                         if (!SMBNTLMv2encrypt(user, workgroup, pass, &server_chal,
 322                                               &names_blob,
 323                                               &lm_response, &nt_response, &session_key)) {
 324                                 data_blob_free(&names_blob);
 325                                 data_blob_free(&server_chal);
 326                                 return NT_STATUS_ACCESS_DENIED;
 327                         }
 328                         data_blob_free(&names_blob);
 329                         data_blob_free(&server_chal);
 330
 331                 } else {
 332                         uchar nt_hash[16];
 333                         E_md4hash(pass, nt_hash);
 334
 335 #ifdef LANMAN_ONLY
 336                         nt_response = data_blob_null;
 337 #else
 338                         nt_response = data_blob(NULL, 24);
 339                         SMBNTencrypt(pass,cli->secblob.data,nt_response.data);
 340 #endif
 341                         /* non encrypted password supplied. Ignore ntpass. */
 342                         if (lp_client_lanman_auth()) {
 343                                 lm_response = data_blob(NULL, 24);
 344                                 if (!SMBencrypt(pass,cli->secblob.data, lm_response.data)) {
 345                                         /* Oops, the LM response is invalid, just put
 346                                            the NT response there instead */
 347                                         data_blob_free(&lm_response);
 348                                         lm_response = data_blob(nt_response.data, nt_response.length);
 349                                 }
 350                         } else {
 351                                 /* LM disabled, place NT# in LM field instead */
 352                                 lm_response = data_blob(nt_response.data, nt_response.length);
 353                         }
 354
 355                         session_key = data_blob(NULL, 16);
 356 #ifdef LANMAN_ONLY
 357                         E_deshash(pass, session_key.data);
 358                         memset(&session_key.data[8], '\0', 8);
 359 #else
 360                         SMBsesskeygen_ntv1(nt_hash, NULL, session_key.data);
 361 #endif
 362                 }
 363 #ifdef LANMAN_ONLY
 364                 cli_simple_set_signing(cli, session_key, lm_response);
 365 #else
 366                 cli_simple_set_signing(cli, session_key, nt_response);
 367 #endif
 368         } else {
 369                 /* pre-encrypted password supplied.  Only used for
 370                    security=server, can't do
 371                    signing because we don't have original key */
 372
 373                 lm_response = data_blob(pass, passlen);
 374                 nt_response = data_blob(ntpass, ntpasslen);
 375         }
 376
 377         /* send a session setup command */
 378         memset(cli->outbuf,'\0',smb_size);
 379
 380         set_message(NULL,cli->outbuf,13,0,True);
 381         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 382         cli_setup_packet(cli);
 383
 384         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 385         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 386         SSVAL(cli->outbuf,smb_vwv3,2);
 387         SSVAL(cli->outbuf,smb_vwv4,cli->pid);
 388         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 389         SSVAL(cli->outbuf,smb_vwv7,lm_response.length);
 390         SSVAL(cli->outbuf,smb_vwv8,nt_response.length);
 391         SIVAL(cli->outbuf,smb_vwv11,capabilities);
 392         p = smb_buf(cli->outbuf);
 393         if (lm_response.length) {
 394                 memcpy(p,lm_response.data, lm_response.length); p += lm_response.length;
 395         }
 396         if (nt_response.length) {
 397                 memcpy(p,nt_response.data, nt_response.length); p += nt_response.length;
 398         }
 399         p += clistr_push(cli, p, user, -1, STR_TERMINATE);
 400
 401         /* Upper case here might help some NTLMv2 implementations */
 402         p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE|STR_UPPER);
 403         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 404         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 405         cli_setup_bcc(cli, p);
 406
 407         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 408                 result = cli_nt_error(cli);
 409                 goto end;
 410         }
 411
 412         /* show_msg(cli->inbuf); */
 413
 414         if (cli_is_error(cli)) {
 415                 result = cli_nt_error(cli);
 416                 goto end;
 417         }
 418
 419         /* use the returned vuid from now on */
 420         cli->vuid = SVAL(cli->inbuf,smb_uid);
 421
 422         p = smb_buf(cli->inbuf);
 423         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 424         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
 425         p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
 426
 427         if (strstr(cli->server_type, "Samba")) {
 428                 cli->is_samba = True;
 429         }
 430
 431         fstrcpy(cli->user_name, user);
 432
 433         if (session_key.data) {
 434                 /* Have plaintext orginal */
 435                 cli_set_session_key(cli, session_key);
 436         }
 437
 438         result = NT_STATUS_OK;
 439 end:
 440         data_blob_free(&lm_response);
 441         data_blob_free(&nt_response);
 442         data_blob_free(&session_key);
 443         return result;
 444 }
 445
 446 /****************************************************************************
 447  Send a extended security session setup blob
 448 ****************************************************************************/
 449
 450 static BOOL cli_session_setup_blob_send(struct cli_state *cli, DATA_BLOB blob)
 451 {
 452         uint32 capabilities = cli_session_setup_capabilities(cli);
 453         char *p;
 454
 455         capabilities |= CAP_EXTENDED_SECURITY;
 456
 457         /* send a session setup command */
 458         memset(cli->outbuf,'\0',smb_size);
 459
 460         set_message(NULL,cli->outbuf,12,0,True);
 461         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 462
 463         cli_setup_packet(cli);
 464
 465         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 466         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 467         SSVAL(cli->outbuf,smb_vwv3,2);
 468         SSVAL(cli->outbuf,smb_vwv4,1);
 469         SIVAL(cli->outbuf,smb_vwv5,0);
 470         SSVAL(cli->outbuf,smb_vwv7,blob.length);
 471         SIVAL(cli->outbuf,smb_vwv10,capabilities);
 472         p = smb_buf(cli->outbuf);
 473         memcpy(p, blob.data, blob.length);
 474         p += blob.length;
 475         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 476         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 477         cli_setup_bcc(cli, p);
 478         return cli_send_smb(cli);
 479 }
 480
 481 /****************************************************************************
 482  Send a extended security session setup blob, returning a reply blob.
 483 ****************************************************************************/
 484
 485 static DATA_BLOB cli_session_setup_blob_receive(struct cli_state *cli)
 486 {
 487         DATA_BLOB blob2 = data_blob_null;
 488         char *p;
 489         size_t len;
 490
 491         if (!cli_receive_smb(cli))
 492                 return blob2;
 493
 494         show_msg(cli->inbuf);
 495
 496         if (cli_is_error(cli) && !NT_STATUS_EQUAL(cli_nt_error(cli),
 497                                                   NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 498                 return blob2;
 499         }
 500
 501         /* use the returned vuid from now on */
 502         cli->vuid = SVAL(cli->inbuf,smb_uid);
 503
 504         p = smb_buf(cli->inbuf);
 505
 506         blob2 = data_blob(p, SVAL(cli->inbuf, smb_vwv3));
 507
 508         p += blob2.length;
 509         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 510
 511         /* w2k with kerberos doesn't properly null terminate this field */
 512         len = smb_buflen(cli->inbuf) - PTR_DIFF(p, smb_buf(cli->inbuf));
 513         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), len, 0);
 514
 515         return blob2;
 516 }
 517
 518 #ifdef HAVE_KRB5
 519 /****************************************************************************
 520  Send a extended security session setup blob, returning a reply blob.
 521 ****************************************************************************/
 522
 523 /* The following is calculated from :
 524  * (smb_size-4) = 35
 525  * (smb_wcnt * 2) = 24 (smb_wcnt == 12 in cli_session_setup_blob_send() )
 526  * (strlen("Unix") + 1 + strlen("Samba") + 1) * 2 = 22 (unicode strings at
 527  * end of packet.
 528  */
 529
 530 #define BASE_SESSSETUP_BLOB_PACKET_SIZE (35 + 24 + 22)
 531
 532 static BOOL cli_session_setup_blob(struct cli_state *cli, DATA_BLOB blob, DATA_BLOB session_key_krb5)
 533 {
 534         int32 remaining = blob.length;
 535         int32 cur = 0;
 536         DATA_BLOB send_blob = data_blob_null;
 537         int32 max_blob_size = 0;
 538         DATA_BLOB receive_blob = data_blob_null;
 539
 540         if (cli->max_xmit < BASE_SESSSETUP_BLOB_PACKET_SIZE + 1) {
 541                 DEBUG(0,("cli_session_setup_blob: cli->max_xmit too small "
 542                         "(was %u, need minimum %u)\n",
 543                         (unsigned int)cli->max_xmit,
 544                         BASE_SESSSETUP_BLOB_PACKET_SIZE));
 545                 cli_set_nt_error(cli, NT_STATUS_INVALID_PARAMETER);
 546                 return False;
 547         }
 548
 549         max_blob_size = cli->max_xmit - BASE_SESSSETUP_BLOB_PACKET_SIZE;
 550
 551         while ( remaining > 0) {
 552                 if (remaining >= max_blob_size) {
 553                         send_blob.length = max_blob_size;
 554                         remaining -= max_blob_size;
 555                 } else {
 556                         DATA_BLOB null_blob = data_blob_null;
 557
 558                         send_blob.length = remaining;
 559                         remaining = 0;
 560
 561                         /* This is the last packet in the sequence - turn signing on. */
 562                         cli_simple_set_signing(cli, session_key_krb5, null_blob);
 563                 }
 564
 565                 send_blob.data =  &blob.data[cur];
 566                 cur += send_blob.length;
 567
 568                 DEBUG(10, ("cli_session_setup_blob: Remaining (%u) sending (%u) current (%u)\n",
 569                         (unsigned int)remaining,
 570                         (unsigned int)send_blob.length,
 571                         (unsigned int)cur ));
 572
 573                 if (!cli_session_setup_blob_send(cli, send_blob)) {
 574                         DEBUG(0, ("cli_session_setup_blob: send failed\n"));
 575                         return False;
 576                 }
 577
 578                 receive_blob = cli_session_setup_blob_receive(cli);
 579                 data_blob_free(&receive_blob);
 580
 581                 if (cli_is_error(cli) &&
 582                                 !NT_STATUS_EQUAL( cli_get_nt_error(cli),
 583                                         NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 584                         DEBUG(0, ("cli_session_setup_blob: recieve failed (%s)\n",
 585                                 nt_errstr(cli_get_nt_error(cli)) ));
 586                         return False;
 587                 }
 588         }
 589
 590         return True;
 591 }
 592
 593 /****************************************************************************
 594  Use in-memory credentials cache
 595 ****************************************************************************/
 596
 597 static void use_in_memory_ccache(void) {
 598         setenv(KRB5_ENV_CCNAME, "MEMORY:cliconnect", 1);
 599 }
 600
 601 /****************************************************************************
 602  Do a spnego/kerberos encrypted session setup.
 603 ****************************************************************************/
 604
 605 static ADS_STATUS cli_session_setup_kerberos(struct cli_state *cli, const char *principal, const char *workgroup)
 606 {
 607         DATA_BLOB negTokenTarg;
 608         DATA_BLOB session_key_krb5;
 609         int rc;
 610
 611         DEBUG(2,("Doing kerberos session setup\n"));
 612
 613         /* generate the encapsulated kerberos5 ticket */
 614         rc = spnego_gen_negTokenTarg(principal, 0, &negTokenTarg, &session_key_krb5, 0, NULL);
 615
 616         if (rc) {
 617                 DEBUG(1, ("cli_session_setup_kerberos: spnego_gen_negTokenTarg failed: %s\n",
 618                         error_message(rc)));
 619                 return ADS_ERROR_KRB5(rc);
 620         }
 621
 622 #if 0
 623         file_save("negTokenTarg.dat", negTokenTarg.data, negTokenTarg.length);
 624 #endif
 625
 626         if (!cli_session_setup_blob(cli, negTokenTarg, session_key_krb5)) {
 627                 data_blob_free(&negTokenTarg);
 628                 data_blob_free(&session_key_krb5);
 629                 ADS_ERROR_NT(cli_nt_error(cli));
 630         }
 631
 632         cli_set_session_key(cli, session_key_krb5);
 633
 634         data_blob_free(&negTokenTarg);
 635         data_blob_free(&session_key_krb5);
 636
 637         if (cli_is_error(cli)) {
 638                 if (NT_STATUS_IS_OK(cli_nt_error(cli))) {
 639                         return ADS_ERROR_NT(NT_STATUS_UNSUCCESSFUL);
 640                 }
 641         }
 642         return ADS_ERROR_NT(cli_nt_error(cli));
 643 }
 644 #endif  /* HAVE_KRB5 */
 645
 646
 647 /****************************************************************************
 648  Do a spnego/NTLMSSP encrypted session setup.
 649 ****************************************************************************/
 650
 651 static NTSTATUS cli_session_setup_ntlmssp(struct cli_state *cli, const char *user,
 652                                           const char *pass, const char *domain)
 653 {
 654         struct ntlmssp_state *ntlmssp_state;
 655         NTSTATUS nt_status;
 656         int turn = 1;
 657         DATA_BLOB msg1;
 658         DATA_BLOB blob = data_blob_null;
 659         DATA_BLOB blob_in = data_blob_null;
 660         DATA_BLOB blob_out = data_blob_null;
 661
 662         cli_temp_set_signing(cli);
 663
 664         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_client_start(&ntlmssp_state))) {
 665                 return nt_status;
 666         }
 667         ntlmssp_want_feature(ntlmssp_state, NTLMSSP_FEATURE_SESSION_KEY);
 668
 669         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(ntlmssp_state, user))) {
 670                 return nt_status;
 671         }
 672         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(ntlmssp_state, domain))) {
 673                 return nt_status;
 674         }
 675         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_password(ntlmssp_state, pass))) {
 676                 return nt_status;
 677         }
 678
 679         do {
 680                 nt_status = ntlmssp_update(ntlmssp_state,
 681                                                   blob_in, &blob_out);
 682                 data_blob_free(&blob_in);
 683                 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED) || NT_STATUS_IS_OK(nt_status)) {
 684                         if (turn == 1) {
 685                                 /* and wrap it in a SPNEGO wrapper */
 686                                 msg1 = gen_negTokenInit(OID_NTLMSSP, blob_out);
 687                         } else {
 688                                 /* wrap it in SPNEGO */
 689                                 msg1 = spnego_gen_auth(blob_out);
 690                         }
 691
 692                         /* now send that blob on its way */
 693                         if (!cli_session_setup_blob_send(cli, msg1)) {
 694                                 DEBUG(3, ("Failed to send NTLMSSP/SPNEGO blob to server!\n"));
 695                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 696                         } else {
 697                                 blob = cli_session_setup_blob_receive(cli);
 698
 699                                 nt_status = cli_nt_error(cli);
 700                                 if (cli_is_error(cli) && NT_STATUS_IS_OK(nt_status)) {
 701                                         if (cli->smb_rw_error == READ_BAD_SIG) {
 702                                                 nt_status = NT_STATUS_ACCESS_DENIED;
 703                                         } else {
 704                                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 705                                         }
 706                                 }
 707                         }
 708                         data_blob_free(&msg1);
 709                 }
 710
 711                 if (!blob.length) {
 712                         if (NT_STATUS_IS_OK(nt_status)) {
 713                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 714                         }
 715                 } else if ((turn == 1) &&
 716                            NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 717                         DATA_BLOB tmp_blob = data_blob_null;
 718                         /* the server might give us back two challenges */
 719                         if (!spnego_parse_challenge(blob, &blob_in,
 720                                                     &tmp_blob)) {
 721                                 DEBUG(3,("Failed to parse challenges\n"));
 722                                 nt_status = NT_STATUS_INVALID_PARAMETER;
 723                         }
 724                         data_blob_free(&tmp_blob);
 725                 } else {
 726                         if (!spnego_parse_auth_response(blob, nt_status, OID_NTLMSSP,
 727                                                         &blob_in)) {
 728                                 DEBUG(3,("Failed to parse auth response\n"));
 729                                 if (NT_STATUS_IS_OK(nt_status)
 730                                     || NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED))
 731                                         nt_status = NT_STATUS_INVALID_PARAMETER;
 732                         }
 733                 }
 734                 data_blob_free(&blob);
 735                 data_blob_free(&blob_out);
 736                 turn++;
 737         } while (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED));
 738
 739         data_blob_free(&blob_in);
 740
 741         if (NT_STATUS_IS_OK(nt_status)) {
 742
 743                 DATA_BLOB key = data_blob(ntlmssp_state->session_key.data,
 744                                           ntlmssp_state->session_key.length);
 745                 DATA_BLOB null_blob = data_blob_null;
 746                 BOOL res;
 747
 748                 fstrcpy(cli->server_domain, ntlmssp_state->server_domain);
 749                 cli_set_session_key(cli, ntlmssp_state->session_key);
 750
 751                 res = cli_simple_set_signing(cli, key, null_blob);
 752
 753                 data_blob_free(&key);
 754
 755                 if (res) {
 756
 757                         /* 'resign' the last message, so we get the right sequence numbers
 758                            for checking the first reply from the server */
 759                         cli_calculate_sign_mac(cli);
 760
 761                         if (!cli_check_sign_mac(cli)) {
 762                                 nt_status = NT_STATUS_ACCESS_DENIED;
 763                         }
 764                 }
 765         }
 766
 767         /* we have a reference counter on ntlmssp_state, if we are signing
 768            then the state will be kept by the signing engine */
 769
 770         ntlmssp_end(&ntlmssp_state);
 771
 772         return nt_status;
 773 }
 774
 775 /****************************************************************************
 776  Do a spnego encrypted session setup.
 777 ****************************************************************************/
 778
 779 ADS_STATUS cli_session_setup_spnego(struct cli_state *cli, const char *user,
 780                               const char *pass, const char *domain)
 781 {
 782         char *principal;
 783         char *OIDs[ASN1_MAX_OIDS];
 784         int i;
 785         BOOL got_kerberos_mechanism = False;
 786         DATA_BLOB blob;
 787
 788         DEBUG(3,("Doing spnego session setup (blob length=%lu)\n", (unsigned long)cli->secblob.length));
 789
 790         /* the server might not even do spnego */
 791         if (cli->secblob.length <= 16) {
 792                 DEBUG(3,("server didn't supply a full spnego negprot\n"));
 793                 goto ntlmssp;
 794         }
 795
 796 #if 0
 797         file_save("negprot.dat", cli->secblob.data, cli->secblob.length);
 798 #endif
 799
 800         /* there is 16 bytes of GUID before the real spnego packet starts */
 801         blob = data_blob(cli->secblob.data+16, cli->secblob.length-16);
 802
 803         /* the server sent us the first part of the SPNEGO exchange in the negprot
 804            reply */
 805         if (!spnego_parse_negTokenInit(blob, OIDs, &principal)) {
 806                 data_blob_free(&blob);
 807                 return ADS_ERROR_NT(NT_STATUS_INVALID_PARAMETER);
 808         }
 809         data_blob_free(&blob);
 810
 811         /* make sure the server understands kerberos */
 812         for (i=0;OIDs[i];i++) {
 813                 DEBUG(3,("got OID=%s\n", OIDs[i]));
 814                 if (strcmp(OIDs[i], OID_KERBEROS5_OLD) == 0 ||
 815                     strcmp(OIDs[i], OID_KERBEROS5) == 0) {
 816                         got_kerberos_mechanism = True;
 817                 }
 818                 free(OIDs[i]);
 819         }
 820
 821         DEBUG(3,("got principal=%s\n", principal ? principal : "<null>"));
 822
 823         if (got_kerberos_mechanism && (principal == NULL)) {
 824                 /*
 825                  * It is WRONG to depend on the principal sent in the negprot
 826                  * reply, but right now we do it. So for safety (don't
 827                  * segfault later) disable Kerberos when no principal was
 828                  * sent. -- VL
 829                  */
 830                 DEBUG(1, ("Kerberos mech was offered, but no principal was "
 831                           "sent, disabling Kerberos\n"));
 832                 cli->use_kerberos = False;
 833         }
 834
 835         fstrcpy(cli->user_name, user);
 836
 837 #ifdef HAVE_KRB5
 838         /* If password is set we reauthenticate to kerberos server
 839          * and do not store results */
 840
 841         if (got_kerberos_mechanism && cli->use_kerberos) {
 842                 ADS_STATUS rc;
 843
 844                 if (pass && *pass) {
 845                         int ret;
 846
 847                         use_in_memory_ccache();
 848                         ret = kerberos_kinit_password(user, pass, 0 /* no time correction for now */, NULL);
 849
 850                         if (ret){
 851                                 SAFE_FREE(principal);
 852                                 DEBUG(0, ("Kinit failed: %s\n", error_message(ret)));
 853                                 if (cli->fallback_after_kerberos)
 854                                         goto ntlmssp;
 855                                 return ADS_ERROR_KRB5(ret);
 856                         }
 857                 }
 858
 859                 rc = cli_session_setup_kerberos(cli, principal, domain);
 860                 if (ADS_ERR_OK(rc) || !cli->fallback_after_kerberos) {
 861                         SAFE_FREE(principal);
 862                         return rc;
 863                 }
 864         }
 865 #endif
 866
 867         SAFE_FREE(principal);
 868
 869 ntlmssp:
 870
 871         return ADS_ERROR_NT(cli_session_setup_ntlmssp(cli, user, pass, domain));
 872 }
 873
 874 /****************************************************************************
 875  Send a session setup. The username and workgroup is in UNIX character
 876  format and must be converted to DOS codepage format before sending. If the
 877  password is in plaintext, the same should be done.
 878 ****************************************************************************/
 879
 880 NTSTATUS cli_session_setup(struct cli_state *cli,
 881                            const char *user,
 882                            const char *pass, int passlen,
 883                            const char *ntpass, int ntpasslen,
 884                            const char *workgroup)
 885 {
 886         char *p;
 887         fstring user2;
 888
 889         /* allow for workgroups as part of the username */
 890         fstrcpy(user2, user);
 891         if ((p=strchr_m(user2,'\\')) || (p=strchr_m(user2,'/')) ||
 892             (p=strchr_m(user2,*lp_winbind_separator()))) {
 893                 *p = 0;
 894                 user = p+1;
 895                 workgroup = user2;
 896         }
 897
 898         if (cli->protocol < PROTOCOL_LANMAN1) {
 899                 return NT_STATUS_OK;
 900         }
 901
 902         /* now work out what sort of session setup we are going to
 903            do. I have split this into separate functions to make the
 904            flow a bit easier to understand (tridge) */
 905
 906         /* if its an older server then we have to use the older request format */
 907
 908         if (cli->protocol < PROTOCOL_NT1) {
 909                 if (!lp_client_lanman_auth() && passlen != 24 && (*pass)) {
 910                         DEBUG(1, ("Server requested LM password but 'client lanman auth'"
 911                                   " is disabled\n"));
 912                         return NT_STATUS_ACCESS_DENIED;
 913                 }
 914
 915                 if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) == 0 &&
 916                     !lp_client_plaintext_auth() && (*pass)) {
 917                         DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
 918                                   " is disabled\n"));
 919                         return NT_STATUS_ACCESS_DENIED;
 920                 }
 921
 922                 return cli_session_setup_lanman2(cli, user, pass, passlen,
 923                                                  workgroup);
 924         }
 925
 926         /* if no user is supplied then we have to do an anonymous connection.
 927            passwords are ignored */
 928
 929         if (!user || !*user)
 930                 return cli_session_setup_guest(cli);
 931
 932         /* if the server is share level then send a plaintext null
 933            password at this point. The password is sent in the tree
 934            connect */
 935
 936         if ((cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL) == 0)
 937                 return cli_session_setup_plaintext(cli, user, "", workgroup);
 938
 939         /* if the server doesn't support encryption then we have to use
 940            plaintext. The second password is ignored */
 941
 942         if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) == 0) {
 943                 if (!lp_client_plaintext_auth() && (*pass)) {
 944                         DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
 945                                   " is disabled\n"));
 946                         return NT_STATUS_ACCESS_DENIED;
 947                 }
 948                 return cli_session_setup_plaintext(cli, user, pass, workgroup);
 949         }
 950
 951         /* if the server supports extended security then use SPNEGO */
 952
 953         if (cli->capabilities & CAP_EXTENDED_SECURITY) {
 954                 ADS_STATUS status = cli_session_setup_spnego(cli, user, pass, workgroup);
 955                 if (!ADS_ERR_OK(status)) {
 956                         DEBUG(3, ("SPNEGO login failed: %s\n", ads_errstr(status)));
 957                         return ads_ntstatus(status);
 958                 }
 959         } else {
 960                 NTSTATUS status;
 961
 962                 /* otherwise do a NT1 style session setup */
 963                 status = cli_session_setup_nt1(cli, user, pass, passlen,
 964                                                ntpass, ntpasslen, workgroup);
 965                 if (!NT_STATUS_IS_OK(status)) {
 966                         DEBUG(3,("cli_session_setup: NT1 session setup "
 967                                  "failed: %s\n", nt_errstr(status)));
 968                         return status;
 969                 }
 970         }
 971
 972         if (strstr(cli->server_type, "Samba")) {
 973                 cli->is_samba = True;
 974         }
 975
 976         return NT_STATUS_OK;
 977 }
 978
 979 /****************************************************************************
 980  Send a uloggoff.
 981 *****************************************************************************/
 982
 983 BOOL cli_ulogoff(struct cli_state *cli)
 984 {
 985         memset(cli->outbuf,'\0',smb_size);
 986         set_message(NULL,cli->outbuf,2,0,True);
 987         SCVAL(cli->outbuf,smb_com,SMBulogoffX);
 988         cli_setup_packet(cli);
 989         SSVAL(cli->outbuf,smb_vwv0,0xFF);
 990         SSVAL(cli->outbuf,smb_vwv2,0);  /* no additional info */
 991
 992         cli_send_smb(cli);
 993         if (!cli_receive_smb(cli))
 994                 return False;
 995
 996         if (cli_is_error(cli)) {
 997                 return False;
 998         }
 999
1000         cli->cnum = -1;
1001         return True;
1002 }
1003
1004 /****************************************************************************
1005  Send a tconX.
1006 ****************************************************************************/
1007
1008 BOOL cli_send_tconX(struct cli_state *cli,
1009                     const char *share, const char *dev, const char *pass, int passlen)
1010 {
1011         fstring fullshare, pword;
1012         char *p;
1013         memset(cli->outbuf,'\0',smb_size);
1014         memset(cli->inbuf,'\0',smb_size);
1015
1016         fstrcpy(cli->share, share);
1017
1018         /* in user level security don't send a password now */
1019         if (cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL) {
1020                 passlen = 1;
1021                 pass = "";
1022         } else if (!pass) {
1023                 DEBUG(1, ("Server not using user level security and no password supplied.\n"));
1024                 return False;
1025         }
1026
1027         if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) &&
1028             *pass && passlen != 24) {
1029                 if (!lp_client_lanman_auth()) {
1030                         DEBUG(1, ("Server requested LANMAN password (share-level security) but 'client use lanman auth'"
1031                                   " is disabled\n"));
1032                         return False;
1033                 }
1034
1035                 /*
1036                  * Non-encrypted passwords - convert to DOS codepage before encryption.
1037                  */
1038                 passlen = 24;
1039                 SMBencrypt(pass,cli->secblob.data,(uchar *)pword);
1040         } else {
1041                 if((cli->sec_mode & (NEGOTIATE_SECURITY_USER_LEVEL|NEGOTIATE_SECURITY_CHALLENGE_RESPONSE)) == 0) {
1042                         if (!lp_client_plaintext_auth() && (*pass)) {
1043                                 DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
1044                                           " is disabled\n"));
1045                                 return False;
1046                         }
1047
1048                         /*
1049                          * Non-encrypted passwords - convert to DOS codepage before using.
1050                          */
1051                         passlen = clistr_push(cli, pword, pass, sizeof(pword), STR_TERMINATE);
1052
1053                 } else {
1054                         if (passlen) {
1055                                 memcpy(pword, pass, passlen);
1056                         }
1057                 }
1058         }
1059
1060         slprintf(fullshare, sizeof(fullshare)-1,
1061                  "\\\\%s\\%s", cli->desthost, share);
1062
1063         set_message(NULL,cli->outbuf,4, 0, True);
1064         SCVAL(cli->outbuf,smb_com,SMBtconX);
1065         cli_setup_packet(cli);
1066
1067         SSVAL(cli->outbuf,smb_vwv0,0xFF);
1068         SSVAL(cli->outbuf,smb_vwv2,TCONX_FLAG_EXTENDED_RESPONSE);
1069         SSVAL(cli->outbuf,smb_vwv3,passlen);
1070
1071         p = smb_buf(cli->outbuf);
1072         if (passlen) {
1073                 memcpy(p,pword,passlen);
1074         }
1075         p += passlen;
1076         p += clistr_push(cli, p, fullshare, -1, STR_TERMINATE |STR_UPPER);
1077         p += clistr_push(cli, p, dev, -1, STR_TERMINATE |STR_UPPER | STR_ASCII);
1078
1079         cli_setup_bcc(cli, p);
1080
1081         cli_send_smb(cli);
1082         if (!cli_receive_smb(cli))
1083                 return False;
1084
1085         if (cli_is_error(cli))
1086                 return False;
1087
1088         clistr_pull(cli, cli->dev, smb_buf(cli->inbuf), sizeof(fstring), -1, STR_TERMINATE|STR_ASCII);
1089
1090         if (cli->protocol >= PROTOCOL_NT1 &&
1091             smb_buflen(cli->inbuf) == 3) {
1092                 /* almost certainly win95 - enable bug fixes */
1093                 cli->win95 = True;
1094         }
1095
1096         /* Make sure that we have the optional support 16-bit field.  WCT > 2 */
1097         /* Avoids issues when connecting to Win9x boxes sharing files */
1098
1099         cli->dfsroot = False;
1100         if ( (CVAL(cli->inbuf, smb_wct))>2 && cli->protocol >= PROTOCOL_LANMAN2 )
1101                 cli->dfsroot = (SVAL( cli->inbuf, smb_vwv2 ) & SMB_SHARE_IN_DFS) ? True : False;
1102
1103         cli->cnum = SVAL(cli->inbuf,smb_tid);
1104         return True;
1105 }
1106
1107 /****************************************************************************
1108  Send a tree disconnect.
1109 ****************************************************************************/
1110
1111 BOOL cli_tdis(struct cli_state *cli)
1112 {
1113         memset(cli->outbuf,'\0',smb_size);
1114         set_message(NULL,cli->outbuf,0,0,True);
1115         SCVAL(cli->outbuf,smb_com,SMBtdis);
1116         SSVAL(cli->outbuf,smb_tid,cli->cnum);
1117         cli_setup_packet(cli);
1118
1119         cli_send_smb(cli);
1120         if (!cli_receive_smb(cli))
1121                 return False;
1122
1123         if (cli_is_error(cli)) {
1124                 return False;
1125         }
1126
1127         cli->cnum = -1;
1128         return True;
1129 }
1130
1131 /****************************************************************************
1132  Send a negprot command.
1133 ****************************************************************************/
1134
1135 void cli_negprot_send(struct cli_state *cli)
1136 {
1137         char *p;
1138         int numprots;
1139
1140         if (cli->protocol < PROTOCOL_NT1)
1141                 cli->use_spnego = False;
1142
1143         memset(cli->outbuf,'\0',smb_size);
1144
1145         /* setup the protocol strings */
1146         set_message(NULL,cli->outbuf,0,0,True);
1147
1148         p = smb_buf(cli->outbuf);
1149         for (numprots=0;
1150              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1151              numprots++) {
1152                 *p++ = 2;
1153                 p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1154         }
1155
1156         SCVAL(cli->outbuf,smb_com,SMBnegprot);
1157         cli_setup_bcc(cli, p);
1158         cli_setup_packet(cli);
1159
1160         SCVAL(smb_buf(cli->outbuf),0,2);
1161
1162         cli_send_smb(cli);
1163 }
1164
1165 /****************************************************************************
1166  Send a negprot command.
1167 ****************************************************************************/
1168
1169 BOOL cli_negprot(struct cli_state *cli)
1170 {
1171         char *p;
1172         int numprots;
1173         int plength;
1174
1175         if (cli->protocol < PROTOCOL_NT1)
1176                 cli->use_spnego = False;
1177
1178         memset(cli->outbuf,'\0',smb_size);
1179
1180         /* setup the protocol strings */
1181         for (plength=0,numprots=0;
1182              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1183              numprots++)
1184                 plength += strlen(prots[numprots].name)+2;
1185
1186         set_message(NULL,cli->outbuf,0,plength,True);
1187
1188         p = smb_buf(cli->outbuf);
1189         for (numprots=0;
1190              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1191              numprots++) {
1192                 *p++ = 2;
1193                 p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1194         }
1195
1196         SCVAL(cli->outbuf,smb_com,SMBnegprot);
1197         cli_setup_packet(cli);
1198
1199         SCVAL(smb_buf(cli->outbuf),0,2);
1200
1201         cli_send_smb(cli);
1202         if (!cli_receive_smb(cli))
1203                 return False;
1204
1205         show_msg(cli->inbuf);
1206
1207         if (cli_is_error(cli) ||
1208             ((int)SVAL(cli->inbuf,smb_vwv0) >= numprots)) {
1209                 return(False);
1210         }
1211
1212         cli->protocol = prots[SVAL(cli->inbuf,smb_vwv0)].prot;
1213
1214         if ((cli->protocol < PROTOCOL_NT1) && cli->sign_info.mandatory_signing) {
1215                 DEBUG(0,("cli_negprot: SMB signing is mandatory and the selected protocol level doesn't support it.\n"));
1216                 return False;
1217         }
1218
1219         if (cli->protocol >= PROTOCOL_NT1) {
1220                 struct timespec ts;
1221                 /* NT protocol */
1222                 cli->sec_mode = CVAL(cli->inbuf,smb_vwv1);
1223                 cli->max_mux = SVAL(cli->inbuf, smb_vwv1+1);
1224                 cli->max_xmit = IVAL(cli->inbuf,smb_vwv3+1);
1225                 cli->sesskey = IVAL(cli->inbuf,smb_vwv7+1);
1226                 cli->serverzone = SVALS(cli->inbuf,smb_vwv15+1);
1227                 cli->serverzone *= 60;
1228                 /* this time arrives in real GMT */
1229                 ts = interpret_long_date(cli->inbuf+smb_vwv11+1);
1230                 cli->servertime = ts.tv_sec;
1231                 cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1232                 cli->capabilities = IVAL(cli->inbuf,smb_vwv9+1);
1233                 if (cli->capabilities & CAP_RAW_MODE) {
1234                         cli->readbraw_supported = True;
1235                         cli->writebraw_supported = True;
1236                 }
1237                 /* work out if they sent us a workgroup */
1238                 if (!(cli->capabilities & CAP_EXTENDED_SECURITY) &&
1239                     smb_buflen(cli->inbuf) > 8) {
1240                         clistr_pull(cli, cli->server_domain,
1241                                     smb_buf(cli->inbuf)+8, sizeof(cli->server_domain),
1242                                     smb_buflen(cli->inbuf)-8, STR_UNICODE|STR_NOALIGN);
1243                 }
1244
1245                 /*
1246                  * As signing is slow we only turn it on if either the client or
1247                  * the server require it. JRA.
1248                  */
1249
1250                 if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
1251                         /* Fail if server says signing is mandatory and we don't want to support it. */
1252                         if (!cli->sign_info.allow_smb_signing) {
1253                                 DEBUG(0,("cli_negprot: SMB signing is mandatory and we have disabled it.\n"));
1254                                 return False;
1255                         }
1256                         cli->sign_info.negotiated_smb_signing = True;
1257                         cli->sign_info.mandatory_signing = True;
1258                 } else if (cli->sign_info.mandatory_signing && cli->sign_info.allow_smb_signing) {
1259                         /* Fail if client says signing is mandatory and the server doesn't support it. */
1260                         if (!(cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED)) {
1261                                 DEBUG(1,("cli_negprot: SMB signing is mandatory and the server doesn't support it.\n"));
1262                                 return False;
1263                         }
1264                         cli->sign_info.negotiated_smb_signing = True;
1265                         cli->sign_info.mandatory_signing = True;
1266                 } else if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
1267                         cli->sign_info.negotiated_smb_signing = True;
1268                 }
1269
1270                 if (cli->capabilities & (CAP_LARGE_READX|CAP_LARGE_WRITEX)) {
1271                         SAFE_FREE(cli->outbuf);
1272                         SAFE_FREE(cli->inbuf);
1273                         cli->outbuf = (char *)SMB_MALLOC(CLI_SAMBA_MAX_LARGE_READX_SIZE+SAFETY_MARGIN);
1274                         cli->inbuf = (char *)SMB_MALLOC(CLI_SAMBA_MAX_LARGE_READX_SIZE+SAFETY_MARGIN);
1275                         cli->bufsize = CLI_SAMBA_MAX_LARGE_READX_SIZE;
1276                 }
1277
1278         } else if (cli->protocol >= PROTOCOL_LANMAN1) {
1279                 cli->use_spnego = False;
1280                 cli->sec_mode = SVAL(cli->inbuf,smb_vwv1);
1281                 cli->max_xmit = SVAL(cli->inbuf,smb_vwv2);
1282                 cli->max_mux = SVAL(cli->inbuf, smb_vwv3);
1283                 cli->sesskey = IVAL(cli->inbuf,smb_vwv6);
1284                 cli->serverzone = SVALS(cli->inbuf,smb_vwv10);
1285                 cli->serverzone *= 60;
1286                 /* this time is converted to GMT by make_unix_date */
1287                 cli->servertime = cli_make_unix_date(cli,cli->inbuf+smb_vwv8);
1288                 cli->readbraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x1) != 0);
1289                 cli->writebraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x2) != 0);
1290                 cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1291         } else {
1292                 /* the old core protocol */
1293                 cli->use_spnego = False;
1294                 cli->sec_mode = 0;
1295                 cli->serverzone = get_time_zone(time(NULL));
1296         }
1297
1298         cli->max_xmit = MIN(cli->max_xmit, CLI_BUFFER_SIZE);
1299
1300         /* a way to force ascii SMB */
1301         if (getenv("CLI_FORCE_ASCII"))
1302                 cli->capabilities &= ~CAP_UNICODE;
1303
1304         return True;
1305 }
1306
1307 /****************************************************************************
1308  Send a session request. See rfc1002.txt 4.3 and 4.3.2.
1309 ****************************************************************************/
1310
1311 BOOL cli_session_request(struct cli_state *cli,
1312                          struct nmb_name *calling, struct nmb_name *called)
1313 {
1314         char *p;
1315         int len = 4;
1316
1317         memcpy(&(cli->calling), calling, sizeof(*calling));
1318         memcpy(&(cli->called ), called , sizeof(*called ));
1319
1320         /* put in the destination name */
1321         p = cli->outbuf+len;
1322         name_mangle(cli->called .name, p, cli->called .name_type);
1323         len += name_len(p);
1324
1325         /* and my name */
1326         p = cli->outbuf+len;
1327         name_mangle(cli->calling.name, p, cli->calling.name_type);
1328         len += name_len(p);
1329
1330         /* 445 doesn't have session request */
1331         if (cli->port == 445)
1332                 return True;
1333
1334         /* send a session request (RFC 1002) */
1335         /* setup the packet length
1336          * Remove four bytes from the length count, since the length
1337          * field in the NBT Session Service header counts the number
1338          * of bytes which follow.  The cli_send_smb() function knows
1339          * about this and accounts for those four bytes.
1340          * CRH.
1341          */
1342         len -= 4;
1343         _smb_setlen(cli->outbuf,len);
1344         SCVAL(cli->outbuf,0,0x81);
1345
1346         cli_send_smb(cli);
1347         DEBUG(5,("Sent session request\n"));
1348
1349         if (!cli_receive_smb(cli))
1350                 return False;
1351
1352         if (CVAL(cli->inbuf,0) == 0x84) {
1353                 /* C. Hoch  9/14/95 Start */
1354                 /* For information, here is the response structure.
1355                  * We do the byte-twiddling to for portability.
1356                 struct RetargetResponse{
1357                 unsigned char type;
1358                 unsigned char flags;
1359                 int16 length;
1360                 int32 ip_addr;
1361                 int16 port;
1362                 };
1363                 */
1364                 int port = (CVAL(cli->inbuf,8)<<8)+CVAL(cli->inbuf,9);
1365                 /* SESSION RETARGET */
1366                 putip((char *)&cli->dest_ip,cli->inbuf+4);
1367
1368                 cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip, port, LONG_CONNECT_TIMEOUT);
1369                 if (cli->fd == -1)
1370                         return False;
1371
1372                 DEBUG(3,("Retargeted\n"));
1373
1374                 set_socket_options(cli->fd,user_socket_options);
1375
1376                 /* Try again */
1377                 {
1378                         static int depth;
1379                         BOOL ret;
1380                         if (depth > 4) {
1381                                 DEBUG(0,("Retarget recursion - failing\n"));
1382                                 return False;
1383                         }
1384                         depth++;
1385                         ret = cli_session_request(cli, calling, called);
1386                         depth--;
1387                         return ret;
1388                 }
1389         } /* C. Hoch 9/14/95 End */
1390
1391         if (CVAL(cli->inbuf,0) != 0x82) {
1392                 /* This is the wrong place to put the error... JRA. */
1393                 cli->rap_error = CVAL(cli->inbuf,4);
1394                 return False;
1395         }
1396         return(True);
1397 }
1398
1399 /****************************************************************************
1400  Open the client sockets.
1401 ****************************************************************************/
1402
1403 NTSTATUS cli_connect(struct cli_state *cli, const char *host, struct in_addr *ip)
1404 {
1405         int name_type = 0x20;
1406         char *p;
1407
1408         /* reasonable default hostname */
1409         if (!host) host = "*SMBSERVER";
1410
1411         fstrcpy(cli->desthost, host);
1412
1413         /* allow hostnames of the form NAME#xx and do a netbios lookup */
1414         if ((p = strchr(cli->desthost, '#'))) {
1415                 name_type = strtol(p+1, NULL, 16);
1416                 *p = 0;
1417         }
1418
1419         if (!ip || is_zero_ip(*ip)) {
1420                 if (!resolve_name(cli->desthost, &cli->dest_ip, name_type)) {
1421                         return NT_STATUS_BAD_NETWORK_NAME;
1422                 }
1423                 if (ip) *ip = cli->dest_ip;
1424         } else {
1425                 cli->dest_ip = *ip;
1426         }
1427
1428         if (getenv("LIBSMB_PROG")) {
1429                 cli->fd = sock_exec(getenv("LIBSMB_PROG"));
1430         } else {
1431                 /* try 445 first, then 139 */
1432                 int port = cli->port?cli->port:445;
1433                 cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip,
1434                                           port, cli->timeout);
1435                 if (cli->fd == -1 && cli->port == 0) {
1436                         port = 139;
1437                         cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip,
1438                                                   port, cli->timeout);
1439                 }
1440                 if (cli->fd != -1)
1441                         cli->port = port;
1442         }
1443         if (cli->fd == -1) {
1444                 DEBUG(1,("Error connecting to %s (%s)\n",
1445                          ip?inet_ntoa(*ip):host,strerror(errno)));
1446                 return map_nt_error_from_unix(errno);
1447         }
1448
1449         set_socket_options(cli->fd,user_socket_options);
1450
1451         return NT_STATUS_OK;
1452 }
1453
1454 /**
1455    establishes a connection to after the negprot.
1456    @param output_cli A fully initialised cli structure, non-null only on success
1457    @param dest_host The netbios name of the remote host
1458    @param dest_ip (optional) The the destination IP, NULL for name based lookup
1459    @param port (optional) The destination port (0 for default)
1460    @param retry BOOL. Did this connection fail with a retryable error ?
1461
1462 */
1463 NTSTATUS cli_start_connection(struct cli_state **output_cli,
1464                               const char *my_name,
1465                               const char *dest_host,
1466                               struct in_addr *dest_ip, int port,
1467                               int signing_state, int flags,
1468                               BOOL *retry)
1469 {
1470         NTSTATUS nt_status;
1471         struct nmb_name calling;
1472         struct nmb_name called;
1473         struct cli_state *cli;
1474         struct in_addr ip;
1475
1476         if (retry)
1477                 *retry = False;
1478
1479         if (!my_name)
1480                 my_name = global_myname();
1481
1482         if (!(cli = cli_initialise())) {
1483                 return NT_STATUS_NO_MEMORY;
1484         }
1485
1486         make_nmb_name(&calling, my_name, 0x0);
1487         make_nmb_name(&called , dest_host, 0x20);
1488
1489         if (cli_set_port(cli, port) != port) {
1490                 cli_shutdown(cli);
1491                 return NT_STATUS_UNSUCCESSFUL;
1492         }
1493
1494         cli_set_timeout(cli, 10000); /* 10 seconds. */
1495
1496         if (dest_ip)
1497                 ip = *dest_ip;
1498         else
1499                 ZERO_STRUCT(ip);
1500
1501 again:
1502
1503         DEBUG(3,("Connecting to host=%s\n", dest_host));
1504
1505         nt_status = cli_connect(cli, dest_host, &ip);
1506         if (!NT_STATUS_IS_OK(nt_status)) {
1507                 DEBUG(1,("cli_start_connection: failed to connect to %s (%s). Error %s\n",
1508                          nmb_namestr(&called), inet_ntoa(ip), nt_errstr(nt_status) ));
1509                 cli_shutdown(cli);
1510                 return nt_status;
1511         }
1512
1513         if (retry)
1514                 *retry = True;
1515
1516         if (!cli_session_request(cli, &calling, &called)) {
1517                 char *p;
1518                 DEBUG(1,("session request to %s failed (%s)\n",
1519                          called.name, cli_errstr(cli)));
1520                 if ((p=strchr(called.name, '.')) && !is_ipaddress(called.name)) {
1521                         *p = 0;
1522                         goto again;
1523                 }
1524                 if (strcmp(called.name, "*SMBSERVER")) {
1525                         make_nmb_name(&called , "*SMBSERVER", 0x20);
1526                         goto again;
1527                 }
1528                 return NT_STATUS_BAD_NETWORK_NAME;
1529         }
1530
1531         cli_setup_signing_state(cli, signing_state);
1532
1533         if (flags & CLI_FULL_CONNECTION_DONT_SPNEGO)
1534                 cli->use_spnego = False;
1535         else if (flags & CLI_FULL_CONNECTION_USE_KERBEROS)
1536                 cli->use_kerberos = True;
1537
1538         if (!cli_negprot(cli)) {
1539                 DEBUG(1,("failed negprot\n"));
1540                 nt_status = cli_nt_error(cli);
1541                 if (NT_STATUS_IS_OK(nt_status)) {
1542                         nt_status = NT_STATUS_UNSUCCESSFUL;
1543                 }
1544                 cli_shutdown(cli);
1545                 return nt_status;
1546         }
1547
1548         *output_cli = cli;
1549         return NT_STATUS_OK;
1550 }
1551
1552
1553 /**
1554    establishes a connection right up to doing tconX, password specified.
1555    @param output_cli A fully initialised cli structure, non-null only on success
1556    @param dest_host The netbios name of the remote host
1557    @param dest_ip (optional) The the destination IP, NULL for name based lookup
1558    @param port (optional) The destination port (0 for default)
1559    @param service (optional) The share to make the connection to.  Should be 'unqualified' in any way.
1560    @param service_type The 'type' of serivice.
1561    @param user Username, unix string
1562    @param domain User's domain
1563    @param password User's password, unencrypted unix string.
1564    @param retry BOOL. Did this connection fail with a retryable error ?
1565 */
1566
1567 NTSTATUS cli_full_connection(struct cli_state **output_cli,
1568                              const char *my_name,
1569                              const char *dest_host,
1570                              struct in_addr *dest_ip, int port,
1571                              const char *service, const char *service_type,
1572                              const char *user, const char *domain,
1573                              const char *password, int flags,
1574                              int signing_state,
1575                              BOOL *retry)
1576 {
1577         NTSTATUS nt_status;
1578         struct cli_state *cli = NULL;
1579         int pw_len = password ? strlen(password)+1 : 0;
1580
1581         *output_cli = NULL;
1582
1583         if (password == NULL) {
1584                 password = "";
1585         }
1586
1587         nt_status = cli_start_connection(&cli, my_name, dest_host,
1588                                          dest_ip, port, signing_state, flags, retry);
1589
1590         if (!NT_STATUS_IS_OK(nt_status)) {
1591                 return nt_status;
1592         }
1593
1594         nt_status = cli_session_setup(cli, user, password, pw_len, password,
1595                                       pw_len, domain);
1596         if (!NT_STATUS_IS_OK(nt_status)) {
1597
1598                 if (!(flags & CLI_FULL_CONNECTION_ANONYMOUS_FALLBACK)) {
1599                         DEBUG(1,("failed session setup with %s\n",
1600                                  nt_errstr(nt_status)));
1601                         cli_shutdown(cli);
1602                         return nt_status;
1603                 }
1604
1605                 nt_status = cli_session_setup(cli, "", "", 0, "", 0, domain);
1606                 if (!NT_STATUS_IS_OK(nt_status)) {
1607                         DEBUG(1,("anonymous failed session setup with %s\n",
1608                                  nt_errstr(nt_status)));
1609                         cli_shutdown(cli);
1610                         return nt_status;
1611                 }
1612         }
1613
1614         if (service) {
1615                 if (!cli_send_tconX(cli, service, service_type, password, pw_len)) {
1616                         nt_status = cli_nt_error(cli);
1617                         DEBUG(1,("failed tcon_X with %s\n", nt_errstr(nt_status)));
1618                         cli_shutdown(cli);
1619                         if (NT_STATUS_IS_OK(nt_status)) {
1620                                 nt_status = NT_STATUS_UNSUCCESSFUL;
1621                         }
1622                         return nt_status;
1623                 }
1624         }
1625
1626         cli_init_creds(cli, user, domain, password);
1627
1628         *output_cli = cli;
1629         return NT_STATUS_OK;
1630 }
1631
1632 /****************************************************************************
1633  Attempt a NetBIOS session request, falling back to *SMBSERVER if needed.
1634 ****************************************************************************/
1635
1636 BOOL attempt_netbios_session_request(struct cli_state **ppcli, const char *srchost, const char *desthost,
1637                                      struct in_addr *pdest_ip)
1638 {
1639         struct nmb_name calling, called;
1640
1641         make_nmb_name(&calling, srchost, 0x0);
1642
1643         /*
1644          * If the called name is an IP address
1645          * then use *SMBSERVER immediately.
1646          */
1647
1648         if(is_ipaddress(desthost)) {
1649                 make_nmb_name(&called, "*SMBSERVER", 0x20);
1650         } else {
1651                 make_nmb_name(&called, desthost, 0x20);
1652         }
1653
1654         if (!cli_session_request(*ppcli, &calling, &called)) {
1655                 NTSTATUS status;
1656                 struct nmb_name smbservername;
1657
1658                 make_nmb_name(&smbservername , "*SMBSERVER", 0x20);
1659
1660                 /*
1661                  * If the name wasn't *SMBSERVER then
1662                  * try with *SMBSERVER if the first name fails.
1663                  */
1664
1665                 if (nmb_name_equal(&called, &smbservername)) {
1666
1667                         /*
1668                          * The name used was *SMBSERVER, don't bother with another name.
1669                          */
1670
1671                         DEBUG(0,("attempt_netbios_session_request: %s rejected the session for name *SMBSERVER \
1672 with error %s.\n", desthost, cli_errstr(*ppcli) ));
1673                         return False;
1674                 }
1675
1676                 /* Try again... */
1677                 cli_shutdown(*ppcli);
1678
1679                 *ppcli = cli_initialise();
1680                 if (!*ppcli) {
1681                         /* Out of memory... */
1682                         return False;
1683                 }
1684
1685                 status = cli_connect(*ppcli, desthost, pdest_ip);
1686                 if (!NT_STATUS_IS_OK(status) ||
1687                                 !cli_session_request(*ppcli, &calling, &smbservername)) {
1688                         DEBUG(0,("attempt_netbios_session_request: %s rejected the session for \
1689 name *SMBSERVER with error %s\n", desthost, cli_errstr(*ppcli) ));
1690                         return False;
1691                 }
1692         }
1693
1694         return True;
1695 }
1696
1697
1698
1699
1700
1701 /****************************************************************************
1702  Send an old style tcon.
1703 ****************************************************************************/
1704 NTSTATUS cli_raw_tcon(struct cli_state *cli,
1705                       const char *service, const char *pass, const char *dev,
1706                       uint16 *max_xmit, uint16 *tid)
1707 {
1708         char *p;
1709
1710         if (!lp_client_plaintext_auth() && (*pass)) {
1711                 DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
1712                           " is disabled\n"));
1713                 return NT_STATUS_ACCESS_DENIED;
1714         }
1715
1716         memset(cli->outbuf,'\0',smb_size);
1717         memset(cli->inbuf,'\0',smb_size);
1718
1719         set_message(NULL,cli->outbuf, 0, 0, True);
1720         SCVAL(cli->outbuf,smb_com,SMBtcon);
1721         cli_setup_packet(cli);
1722
1723         p = smb_buf(cli->outbuf);
1724         *p++ = 4; p += clistr_push(cli, p, service, -1, STR_TERMINATE | STR_NOALIGN);
1725         *p++ = 4; p += clistr_push(cli, p, pass, -1, STR_TERMINATE | STR_NOALIGN);
1726         *p++ = 4; p += clistr_push(cli, p, dev, -1, STR_TERMINATE | STR_NOALIGN);
1727
1728         cli_setup_bcc(cli, p);
1729
1730         cli_send_smb(cli);
1731         if (!cli_receive_smb(cli)) {
1732                 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
1733         }
1734
1735         if (cli_is_error(cli)) {
1736                 return cli_nt_error(cli);
1737         }
1738
1739         *max_xmit = SVAL(cli->inbuf, smb_vwv0);
1740         *tid = SVAL(cli->inbuf, smb_vwv1);
1741
1742         return NT_STATUS_OK;
1743 }
1744
1745 /* Return a cli_state pointing at the IPC$ share for the given server */
1746
1747 struct cli_state *get_ipc_connect(char *server, struct in_addr *server_ip,
1748                                          struct user_auth_info *user_info)
1749 {
1750         struct cli_state *cli;
1751         pstring myname;
1752         NTSTATUS nt_status;
1753
1754         get_myname(myname);
1755
1756         nt_status = cli_full_connection(&cli, myname, server, server_ip, 0, "IPC$", "IPC",
1757                                         user_info->username, lp_workgroup(), user_info->password,
1758                                         CLI_FULL_CONNECTION_ANONYMOUS_FALLBACK, Undefined, NULL);
1759
1760         if (NT_STATUS_IS_OK(nt_status)) {
1761                 return cli;
1762         } else if (is_ipaddress(server)) {
1763             /* windows 9* needs a correct NMB name for connections */
1764             fstring remote_name;
1765
1766             if (name_status_find("*", 0, 0, *server_ip, remote_name)) {
1767                 cli = get_ipc_connect(remote_name, server_ip, user_info);
1768                 if (cli)
1769                     return cli;
1770             }
1771         }
1772         return NULL;
1773 }
1774
1775 /*
1776  * Given the IP address of a master browser on the network, return its
1777  * workgroup and connect to it.
1778  *
1779  * This function is provided to allow additional processing beyond what
1780  * get_ipc_connect_master_ip_bcast() does, e.g. to retrieve the list of master
1781  * browsers and obtain each master browsers' list of domains (in case the
1782  * first master browser is recently on the network and has not yet
1783  * synchronized with other master browsers and therefore does not yet have the
1784  * entire network browse list)
1785  */
1786
1787 struct cli_state *get_ipc_connect_master_ip(struct ip_service * mb_ip, pstring workgroup, struct user_auth_info *user_info)
1788 {
1789         static fstring name;
1790         struct cli_state *cli;
1791         struct in_addr server_ip;
1792
1793         DEBUG(99, ("Looking up name of master browser %s\n",
1794                    inet_ntoa(mb_ip->ip)));
1795
1796         /*
1797          * Do a name status query to find out the name of the master browser.
1798          * We use <01><02>__MSBROWSE__<02>#01 if *#00 fails because a domain
1799          * master browser will not respond to a wildcard query (or, at least,
1800          * an NT4 server acting as the domain master browser will not).
1801          *
1802          * We might be able to use ONLY the query on MSBROWSE, but that's not
1803          * yet been tested with all Windows versions, so until it is, leave
1804          * the original wildcard query as the first choice and fall back to
1805          * MSBROWSE if the wildcard query fails.
1806          */
1807         if (!name_status_find("*", 0, 0x1d, mb_ip->ip, name) &&
1808             !name_status_find(MSBROWSE, 1, 0x1d, mb_ip->ip, name)) {
1809
1810                 DEBUG(99, ("Could not retrieve name status for %s\n",
1811                            inet_ntoa(mb_ip->ip)));
1812                 return NULL;
1813         }
1814
1815         if (!find_master_ip(name, &server_ip)) {
1816                 DEBUG(99, ("Could not find master ip for %s\n", name));
1817                 return NULL;
1818         }
1819
1820                 pstrcpy(workgroup, name);
1821
1822                 DEBUG(4, ("found master browser %s, %s\n",
1823                   name, inet_ntoa(mb_ip->ip)));
1824
1825                 cli = get_ipc_connect(inet_ntoa(server_ip), &server_ip, user_info);
1826
1827                 return cli;
1828
1829 }
1830
1831 /*
1832  * Return the IP address and workgroup of a master browser on the network, and
1833  * connect to it.
1834  */
1835
1836 struct cli_state *get_ipc_connect_master_ip_bcast(pstring workgroup, struct user_auth_info *user_info)
1837 {
1838         struct ip_service *ip_list;
1839         struct cli_state *cli;
1840         int i, count;
1841
1842         DEBUG(99, ("Do broadcast lookup for workgroups on local network\n"));
1843
1844         /* Go looking for workgroups by broadcasting on the local network */
1845
1846         if (!name_resolve_bcast(MSBROWSE, 1, &ip_list, &count)) {
1847                 DEBUG(99, ("No master browsers responded\n"));
1848                 return False;
1849         }
1850
1851         for (i = 0; i < count; i++) {
1852             DEBUG(99, ("Found master browser %s\n", inet_ntoa(ip_list[i].ip)));
1853
1854             cli = get_ipc_connect_master_ip(&ip_list[i], workgroup, user_info);
1855             if (cli)
1856                     return(cli);
1857         }
1858
1859         return NULL;
1860 }